using JD.Kernel.StaticHelpers;

namespace JD.TeaBoxAddinSystem.Addins.Description.Conditions
{
    /// <summary>
    /// A condition that implements the NOT operator.
    /// </summary>
    internal class NotCondition : CompositeCondition
    {
        #region Constructor

        /// <summary>
        /// Constructor.
        /// </summary>
        /// <param name="innerCondition"></param>
        public NotCondition(Condition innerCondition)
            : base(innerCondition)
        {
            Throw.IfNull(innerCondition, "innerCondition");
        }

        #endregion

        #region Methods

        /// <summary>
        /// Overriden.
        /// </summary>
        /// <returns></returns>
        public override bool Evaluate()
        {
            System.Diagnostics.Debug.Assert(InnerConditions.Length == 1);
            return !InnerConditions[0].Evaluate();
        }

        /// <summary>
        /// Overriden.
        /// </summary>
        /// <returns></returns>
        public override string ToString()
        {
            System.Diagnostics.Debug.Assert(InnerConditions.Length == 1);
            return $"!{InnerConditions[0]}";
        }

        #endregion
    }
}